That may be true at your club, but at the 3 clubs I have shot trap there has been comments, looks and body language/movements from older gents almost every visit towards younger people. One of those clubs seemingly has an over/under gun or you’re not cool mentality. It pisses them off when I shoot near perfect rounds with my 870 and if anyone shows up with anything near a tactical looking gun (read anything but a traditional looking O\U) it’s just ridiculous.
From what I have seen, the reason you see so few young people shooting trap, skeet, whatever is the fudd and elitist attitudes from the old boys. I personally don’t care as I have never been one to even consider, let alone care, what others think of me. But, with so many young people having such thin skin it’s quite easy to understand why the sport is dying off.
Cost is no issue and IMO is just an excuse being used for those who don’t want to admit what’s really happening.